[英]Can not open zip file after downloading through nodejs application because of Invalid CEN error
I need to download and unzip zip archive in my nodejs application. 我需要在我的nodejs应用程序中下载并解压缩zip存档。 I have this code:
我有以下代码:
utils.apiRequest(teamcityOptions)
.then(function (loadedData) {
var tempDir = tmp.dirSync();
var tmpZipFileName = tempDir.name + "\\" + 'bob.zip';
fs.appendFileSync(tmpZipFileName, loadedData);
var zip;
try {
zip = new AdmZip(tmpZipFileName);
} catch (e) {
log('Can not create zip, bad data', e);
}
});
This code gives me error: 这段代码给我错误:
Can not create zip, bad data Invalid CEN header (bad signature)
无法创建zip,数据错误CEN标头无效(签名错误)
I am using Windows 7. I can't even open this ZIP file with 7-zip or WinRAR (simple error like corrupted data). 我使用的是Windows7。我什至无法使用7-zip或WinRAR(诸如损坏的数据之类的简单错误)打开此ZIP文件。
Also, utils.apiRequest
function body is: 另外,
utils.apiRequest
函数主体为:
utils.apiRequest: function (options) {
var deferred = defer();
https.get(options, function (request) {
var loadedData = '';
request.on('data', function (dataBlock) {
loadedData += dataBlock.toString('utf8');
});
request.on('end', function () {
deferred.resolve(loadedData);
})
});
return deferred.promise;
}
How can I solve my problem? 我该如何解决我的问题?
PS: I don't have problems using curl
:) PS:我没有使用
curl
问题:)
The problem is that you're decoding the received data into an utf8 string: 问题是您要将接收到的数据解码为utf8字符串:
request.on('data', function (dataBlock) {
loadedData += dataBlock.toString('utf8'); // this is wrong
});
Since a zip file is binary you should use a Buffer. 由于zip文件是二进制文件,因此您应该使用Buffer。
Here is an example replacement for your utils.apiRequest
with Buffer: 这是用Buffer替换
utils.apiRequest
的示例:
utils.apiRequest: function (options) {
var deferred = defer();
https.get(options, function (request) {
var data = [];
request.on('data', function (dataBlock) {
data.push(dataBlock);
});
request.on('end', function () {
deferred.resolve(Buffer.concat(data));
});
});
return deferred.promise;
}
(Adding as an answer so I can post the code snippet) (添加为答案,以便我可以发布代码段)
@vincent is on the right track I think - sounds like you're not writing the data as binary to the file. 我认为@vincent处在正确的轨道上-听起来好像您没有将数据以二进制形式写入文件。 It's often easier to just pipe a download request straight to a file:
将下载请求直接传送到文件通常更容易:
var http = require('http');
var fs = require('fs');
var AdmZip = require('adm-zip')
var tmpZipStream = fs.createWriteStream('bob.zip');
var request = http.get('http://example.com/example.zip', function(response) {
response.pipe(tmpZipStream);
});
tmpZipStream.on('close', function() {
var zip;
try {
zip = new AdmZip('bob.zip');
} catch (e) {
console.log('Can not create zip, bad data', e);
}
})
Without knowing where utils.apiRequest comes from it's hard to say if this is workable for you, but hopefully it helps. 不知道utils.apiRequest来自何处,很难说这是否对您有用,但希望它会有所帮助。
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